Finding the Fourth Proportional to 1,392,220.10, 1,921,352.53 and 780,373.02
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Solution
The fourth proportional to 1,392,220.10, 1,921,352.53 and 780,373.02 is: 1,076,964.54
Step by Step Solution
- Step 1: Write the proportion equation
1,392,220.10 : 1,921,352.53 = 780,373.02 : x - Step 2: Convert to fraction form
1,392,220.10/1,921,352.53 = 780,373.02/x - Step 3: Cross multiply
1,392,220.10x = 1,921,352.53 × 780,373.02 - Step 4: Simplify right side
1,392,220.10x = 1,499,371,676,320.74 - Step 5: Solve for x
x = 1,499,371,676,320.74/1,392,220.10 - Step 6: Final answer
x = 1,076,964.54
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.